Apparatus for treating skin diseases, &amp;c.



No. 740,873. PATENTBD OCT. 6, 1903. J. KJELDSEN. APPARATUS PORTRBATINGSKIN DISEASES, Sw.. Brummen Hmm 00T. 2a, 1900.A

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J. KJELDSBN. APPARATUS FOR- TRBATING SKIN DISEASES, &o.

APPLICATION FILED 00T. 23, i900.

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UNiTnD STATESPATENTLQrrion .IAKOB KJ-ELDSEN, OF COPENHAGEN, DENMARK.

APPARATUS `FOR -TREATING SKIN DISEASES, 81.0.y

SPECIFICATION forming part of Letters Patent No. 740,878, dated October6, 1903.

Application led October Z3, 1900. Serial No. 84,102. (No model.)

To ad whom it may concern:

Be it known that I, JAKOBKJELDSEN, of Copenhagen, in the Kingdom ofDenmark, have invented a new and Improved Apparatus for Treating SkinDiseases, duc., of which the following; is a full, clear, and exactspecitication. y,

In medicine, applied chemistry, and for many other technical purposesthechemical rays of electrical lamps have been largely used. In thetherapeutical, the telegraphical, and the photographical worldespecially considerable practical use has been made of these rays--forinstance, in light-printing and photographic establishments, hospitalsfor the treatment-of certain skin diseases, dec. Immense arc-lamps whoserays expand over the whole normal spectrum are usually used. In somecases (lupus, dsc.) the disadvantageons eiect of the red and ultra-redrays is usually avoided by passing the rays through water to whichdifferent colors are added. .In similar ways the other parts of thespectrum can be absorbed. By the processes now used the light, however,still contains a considerable part of these detrimental (for the purposein question) parts of the spectrum. It is easy to understand that bythese lamps considerable more energy is required than is really renderedeffective. Generally only onefifth of the total energy of the lamp isutilized. -For this reason such lamps are most unprotitable to use forsuch purposes. These lamps are also expensive to construct and requirecomplicated telescopic apparatuses and refrigerating means for focusingand cooling the rays. Besides this it is necessary in therapenticalscience to keep the part of the skin treated cool by irrigation withcold water on account of the heat rays, of which the light contains aconsiderable part. This is often very disagreeable forthe patient. Thesedrawbacks are the reason why the chemical rays are much less used thanwould be the case under more economical circumstances.

My invention relates to apparatus for treating skin diseases, &c.,bychemical rays in such away that all the above-mentioned objections areobviated.

The special feature in my invention consists in using electric-arc lampsprovided withv electrodes which wholly consist of metals telegraphicpurposes, tbc.

whose illuminating-vapors form a linear spectrum of YWholly or aboutwholly chemical rays which are speciall y adapted for the treatment ofskin diseases, for photographic and As specially suitable electrodes maybe mentioned electrodes made of iron, aluminium, mercury, silver, tin,lead, copper, zinc, dic. To prevent the melting of these metallicelectrodes, they maybe cooled in the usual way. The electrodes areconned in a suitable chamber or casing provided with plates or lensesformed of materials which will readily permit the passage of theultra-violet rays-for instance, rock-crystal. The rays pass throughthe'windows or lenses of the casing to the object to be treated.

The accompanying drawings show in Figures l and 2 a diagram of twospecimens of such lamps. Fig. 3 shows a lamp complete,the viewillustrating the application of the rays to the arm of a patient. Fig. 4shows a modication in the arrangement of the rock-crystal lens. Fig. 5shows alamp in which one of the electrodes consists of mercury, and Fig.6 shows the electrodes and the lens without a casing.

In Fig. l, a is the lamp; c, one of the elec trodes,`which is formedlike a bar, for instance, of iron and surrounded by a cylinder b. d is areceptacle containingr the other electrode, which may consist ofmercury. m5 indicates the Window or lens through which the rays pass.

In Fig. 2 both electrodes c andiare hollow bodies. The electrode c isvshown with a screwed cap c', which can be easily changed if it should beburned.

In Fig. 3, a. represents the lamp which contains themetallic-electrodes, the lamp being provided with a handle. m is therock-crystal lens for directing the rays upon the part of the body to betreated.

In Fig. 4 the lens m instead yot being attached to the lamp is shownattachedl to th part of the bodyV to be treated. f

In Fig. 5 the lamp-casing contains the electrodes c d", one of theelectrodes d consisting of mercury. At one side of the casing is atelescopic rock-crystal lens m2 and at the other side two lenses m3 m3,with a spacem between.

In Fig. 6 the casing is omitted. c2 and d2 ICG represent the electrodes.Z is a support for the electrode c2, and m4 is the rock-crystal lens,suitably supported.

By my apparatus the greatest possible number of skin-curing rays isobtained for a certain strength of the electric current, the metallicelectrodes being much richer in rays of the violet part of the spectrumthan are electrodes of carbon and the rays from the electrodes passingthrough a material which permits all the Violet rays to passundisturbed.

The experiments which 1 have made show that the consumption of electricenergy in my lamps is diminished ninety per cent. in comparison with thelamps now in use. My lamps have, further, a photochemical action of aproportion of forty to one compared with the usual lamps. The proportionVaries in accordance with the sorts of metal which are used.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. Apparatus for treating skin diseases, comprising an electric circuit,metallic electrodes included in said circuit and between which an arc isproduced showing a linear spectrum consisting essentially of chemical vrays, the apparatus being arranged to direct the said rays upon theobject to be treated, as set forth.

2. Apparatus for treating skin diseases, comprising an electric circuitincluding an arc-lamp both electrodes of which consist of metal, wherebythe arc forms a linear spectrum, and a plate or lens formed of materialreadily penetrable by the rays and through which they pass to the objectto be treated, as set forth.

3. Apparatus for treating skin diseases, comprising au electric circuitprovided With metallic electrodes between which an are is produced, anda rock-crystal lens through which the rays pass to the object to betreated, as set forth.

4. Apparatus for treating skin diseases comprising an arc-lamp, havingmetallic electrodes, thereby producing essentially chemical rays, and acasing surrounding the arc and provided with a lens or Window formed ofmaterial easily penetrable by the chemical rays, as set forth.

5. Apparatus for treating skin diseases comprising an arc-lamp havingmetallic electrodes, a casing surrounding the arc, and rock-crystalWindows in said casing through which the rays pass, thereby forming alinear spectrum with a surplus of rays in the violet part of thespectrum, as set forth.

In witness whereof I have hereunto set my hand in presence of twoWitnesses.

JAK'oB KJELDSEN.

Witnesses:

CHARLES HUDE, J. C. JACoBsEN.

